2015

4.5

2016

6.1

2016

6.7

1980

5.9

2023

6.4

2013

6.1

1998

6.1

2001

5.8

1991

5.7

1995

7.8

1985

4.3

1940

6.3

1975

6.8

2003

6.2

2005

6.9

1961

6.7

2017

5.5

2013

6.7

2009

7.3

1992

7.7